I can't answer Roy's question, but I'll relate my experience with flashlights. I have a few flashlights that use the non-rechargeable AA alkaline batteries, or the equivalent rechargeable NiMH type. The size of the AA alkaline batteries is very well standardized, while the diameter of the (cheaply made) NiMH batteries vary depending on the manufacturers. When I put an NiMH battery that's slightly smaller than an AA alkaline battery into the flashlight, it moves laterally a bit and causes the light to flicker. The flickering indicates an unsteady supply of power as the battery top and bottom surfaces move across the contacts/springs of the flashlight. If the same unsteady supply of power occurs when using a 1/4" AGC fuse in a 9/32" AGS fuse holder, it COULD have an effect on the longevity of the fuse. That's just my theory. I'm not an EE nor electrician.

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